In another post (A most intriguing cold-start misfire mystery) I found this quote:
Mass air flow = 3.66 g/s Fuel flow = 1.27 l/h, Fuel rail pressure = 380 kPa
This indicates to me that AFR is around 14.88, close to stoich.
How is AFR calculated from these numbers? I know it's the ratio of air mass to fuel mass, but it's making the units work that I'm getting a little lost. In this case the air mass flow rate is in grams per second, and the fuel flow rate is liters per hour. Grams is a measure of mass, and liters a measure of liquid volume. Does this require knowing the density of the fuel to make the calculation?
As always thank you to @Zaid for getting me thinking.